/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.read;

import org.apache.iotdb.common.rpc.thrift.TRegionReplicaSet;
import org.apache.iotdb.commons.path.PartialPath;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNodeId;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNodeUtil;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanVisitor;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.source.SourceNode;

import java.util.Collections;
import java.util.List;
import java.util.Objects;

public abstract class SchemaQueryScanNode extends SourceNode {
    protected int limit;
    protected int offset;
    protected PartialPath path;
    private boolean hasLimit;
    protected boolean isPrefixPath;

    private TRegionReplicaSet schemaRegionReplicaSet;

    protected SchemaQueryScanNode(PlanNodeId id) {
        this(id, null, false);
    }

    protected SchemaQueryScanNode(
            PlanNodeId id, PartialPath partialPath, int limit, int offset, boolean isPrefixPath) {
        super(id);
        this.path = partialPath;
        setLimit(limit);
        this.offset = offset;
        this.isPrefixPath = isPrefixPath;
    }

    protected SchemaQueryScanNode(PlanNodeId id, PartialPath partialPath, boolean isPrefixPath) {
        this(id, partialPath, 0, 0, isPrefixPath);
    }

    @Override
    public void open() throws Exception {
    }

    @Override
    public int allowedChildCount() {
        return NO_CHILD_ALLOWED;
    }

    @Override
    public List<PlanNode> getChildren() {
        return Collections.emptyList();
    }

    @Override
    public void addChild(PlanNode child) {
    }

    @Override
    public void close() throws Exception {
    }

    public List<PartialPath> getPathPatternList() {
        return Collections.singletonList(path);
    }

    public void setPathPatternList(List<PartialPath> pathPatternList) {
        if (pathPatternList.size() == 1) {
            this.path = pathPatternList.get(0);
        }
    }

    public boolean isPrefixPath() {
        return isPrefixPath;
    }

    public int getLimit() {
        return limit;
    }

    public void setLimit(int limit) {
        this.limit = limit;
        if (limit == 0) {
            hasLimit = false;
        } else {
            hasLimit = true;
        }
    }

    @Override
    public TRegionReplicaSet getRegionReplicaSet() {
        return schemaRegionReplicaSet;
    }

    @Override
    public void setRegionReplicaSet(TRegionReplicaSet schemaRegionReplicaSet) {
        this.schemaRegionReplicaSet = schemaRegionReplicaSet;
    }

    public int getOffset() {
        return offset;
    }

    public void setOffset(int offset) {
        this.offset = offset;
    }

    public PartialPath getPath() {
        return path;
    }

    public void setPath(PartialPath path) {
        this.path = path;
    }

    public boolean isHasLimit() {
        return hasLimit;
    }

    public void setHasLimit(boolean hasLimit) {
        this.hasLimit = hasLimit;
    }

    @Override
    public String toString() {
        return String.format(
                "SchemaQueryScanNode-%s:[Path: %s, DataRegion: %s]",
                this.getPlanNodeId(), path, PlanNodeUtil.printRegionReplicaSet(getRegionReplicaSet()));
    }

    @Override
    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
        return visitor.visitSchemaQueryScan(this, context);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        if (!super.equals(o)) {
            return false;
        }
        SchemaQueryScanNode that = (SchemaQueryScanNode) o;
        return limit == that.limit
                && offset == that.offset
                && isPrefixPath == that.isPrefixPath
                && path.equals(that.path);
    }

    @Override
    public int hashCode() {
        return Objects.hash(super.hashCode(), limit, offset, path, isPrefixPath);
    }
}
